520855 has 8 divisors (see below), whose sum is σ = 634032. Its totient is φ = 410688.

The previous prime is 520853. The next prime is 520867. The reversal of 520855 is 558025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520855 - 2¹ = 520853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (79254).

2⁵²⁰⁸⁵⁵ is an apocalyptic number.

520855 is a deficient number, since it is larger than the sum of its proper divisors (113177).

520855 is a wasteful number, since it uses less digits than its factorization.

520855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 520855 is about 721.7028474379. The cubic root of 520855 is about 80.4585643783.

The spelling of 520855 in words is "five hundred twenty thousand, eight hundred fifty-five".